The news came at Microsoft's Windows 10 briefing, which went down earlier in Redmond, Wash.
- Everything we know about Windows 10
More details on getting the upgrade are available on windows.com, but Microsoft didn't offer a release timeline for when users can expect the Windows 10 upgrade to land.
More from Microsoft's Windows 10 event
- Windows 10 can stream and play with Xbox One games
- Microsoft's new browser is called Project Spartan
- Windows 10 features revealed - Cortana and universal apps come to PC
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